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FACE RECOGNITION FROM FRONT-VIEW FACE
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作者 Wu Lifang Shen Lansun (Signal & Information Processing Laboratory, Beijing Polytechnic University, Beijing 100022) 《Journal of Electronics(China)》 2003年第1期45-50,共6页
This letter presents a face normalization algorithm based on 2-D face model to recognize faces with variant postures from front-view face. A 2-D face mesh model can be extracted from faces with rotation to left or rig... This letter presents a face normalization algorithm based on 2-D face model to recognize faces with variant postures from front-view face. A 2-D face mesh model can be extracted from faces with rotation to left or right and the corresponding front-view mesh model can be estimated according to the facial symmetry. Then based on the inner relationship between the two mesh models, the normalized front-view face is formed by gray level mapping. Finally, the face recognition will be finished based on Principal Component Analysis (PCA). Experiments show that better face recognition performance is achieved in this way. 展开更多
关键词 face normalization 2-D face model Geometric relation in face
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MATHEMATICAL MODEL OF NC MACHINING NONCONVENTIONAL MILLING CUTTERS-FORMING METHOD OF RAKE FACES
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作者 Shen Qian ,Wang Min Nanjing University of Aeronautics and Astronautics 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 1997年第2期156-160,共3页
How to generate rake faces of nonconventional milling cutters (NCMC) with constant spiral angled and normal rake angled edges on NC machine tools is presented by use of a blunt cup grinder or a cup milling cutter. Mot... How to generate rake faces of nonconventional milling cutters (NCMC) with constant spiral angled and normal rake angled edges on NC machine tools is presented by use of a blunt cup grinder or a cup milling cutter. Motion functions of the NC machining system are mathematically deduced and exam- ed by a experiment. The research will provide theoretical and practical guidance for machining noncon- ventional tools on NC machine tools. 展开更多
关键词 Nonconventional milling cutters Spiral angle Normal angle Rake face NC machining
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